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F. A. COLEMAN.

CORE OVEN DOOR.

APPLICATION FILED MAR. 21. 1918.

Patented June 24, 1919.

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CORE OVEN DOOR.

APPLICATION FILED MAR. 27. I918.

Patented June 24, I919.

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UNITED STATES PATENT OFFICE.

FREDERICK A. COLEMAN, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR TO THEFOUNDRY EQUIPMENT COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CORE-OVEN DOOR.

Specification of Letters Patent.

Patented June 24, 1919.

Application filed March 27, 1918. Serial No. 225,140.

T 0 all whom it may concern.

Be it known that I, FREDERICK A. COLE- MAN, residing at ClevelandHeights, in the county of Cuyahoga and State of 01110, have invented acertain new and useful Improvement in Core-Oven Doors, of which thefollowing is a full, clear, and exact description, reference being hadto the accompany ing drawings.

This invention relates to the constructlon of heavy doors and means forcarrying the same, and the essential objects are to provide a simpleeflective door construction and carrying mechanism therefor, which maybe cheaply manufactured, very durable in service and which shall socarry the door that it may be easily swung, to open or close the same. Amore specific object is to prov1de a door hanging mechanism which mayretain the door in its proper position with relation to the openingclosed thereby, without the difficulties of sagging or binding duetowear or warping of the door or the hanging mechanism, while at thesame time making such mechanism as light as possible in proportlon tothe weight of the door, thereby effecting a material savin of metal.

Still another 0 ject is to provide a simple, effective latching devicefor holding the door to its frame at separated points consequent uponthe movement of a single manually operated lever.

My invention is hereinafter more fully de scribed in connection with theaccompanying drawings illustrating a preferred embodiment of myinvention and the essentlal characteristics are'summarized in theclaims.

substantially on the line 55 of Fig. 1; 'Fig. 6 is an enlarged detail ofthe latch operating lever in the nature of a section on the line 66 ofFig. 1.

Describing the parts by the use of reference numerals, 1 designates awall through which is formed a door opening 3.. The wall may be taken asillustrating the front wall of a large core. oven and composed ofmasonry, concrete or like material. At each side of the door opening arevertical channel beams 5 and 6, positioned so that the flanges projectoutwardly from the wall 1 and secured to the wall by bolts 7 extendingthrough the wall and through channel beams 8 and 9 on the inner side ofthe wall. The channel beam 6 is shown as extending downwardly intomasonry 10, forming the floor, to provide a more rigid anchorage wherebythe weight of the door may be carried by the channel member without anydanger of displacing the same.

The door shown in the drawings comprises a large fiat metal plate 12,overlapping the sides of the opening 3 at the sides and top and fittingagainst a raised ramp or thresh old 13 extending across the bottom ofthe opening. As this door is intended to be heat resisting, I provide onthe inner side of the plate a rib extendin in a rectangle entirelyaround the door ust within the opening and formed preferably'of angleiron 15. The space within the rib is shown as filled with suitable,refractory material 16. It is obvious that such door is necessarily veryheavy and to provide a satisfactory means for hanging the door so thatit may be easily swung to open or close, it is desirable that suchhanging mechanism be made light as possible commensurate with the workto be performed, and it is also desirable to suspend the doorsubstantially at the middle portion thereof.

Accordingly I provide across the face of the door large comparativelyheavy outwardly extending flanges 20, shown as comprising one flange ofan angle iron, the other flange 21 of which is suitably secured to theplate 12. At the middle portion of these flanges 20 I provide openingsadapted to receive a vertical shaft 23 shown as held in position bysuitable pins, such as cotter pins 24:. A similar shaft 25 extendsthrough outwardly turned ears 28 of brackets 27 secured to the web ofthe channel 6.

Connecting the two shafts 23 and 25 is a ban er frame com risin smallvertical an-' 7 I gle beams 30 and 31, each havlng one flange turnedtoward the opposite beam and the other flange projecting outwardly fromthe door, the first mentioned flanges being suitably secured to gussetplates 32 and 33 at the top and bottom of the frame, and the gussetplates being connected by short horizontal angle beams and 36 of largercross section and having one flange secured to the gusset plates whilethe other flange projects inwardly toward the door as indicated at 37.The flanges 37 rest at one end upon the ears 26 and have openingsrotatably embracing the shaft 25 while projecting beneath the flanges 20of the angles 21 on the door and embracing the shaft 23. Suitablewashers 38 separate the flanges 37 from the flanges 20 and securefreedom of swinging movement. To strengthen this frame and brace itagainst the major load strain, I provide a suitable brace comprisingcomparatively small angle iron secured to an upper gusset plate 32adjacent the channel 6 and to lower the gusset plate 33 adjacent thecenter of the door, as shown.

To allow the door and frame to swing open somewhat more than '90 degreesfrom its closed position it is necessary to cut away a portion of theouter flange of the channel 6 as indicated at 41, thus permitting theframe adjacent the channel to swing farther around the shaft 25.

It will be seen that this provides a sturdy supporting device for thedoor permitting the door freer swinging movement than mere hinges andinsuringthe balance thereof preventing sagging or binding of the door.

The looking or latching device for holding the dooi tightly in positionwhen closed maybe very simple and inexpensively constructed inaccordance with my invention as follows:

Vertically mounted on the front of the door and having bearings in theflanges 20 and outwardly extending ears or clips 45 is a rock shaft 46.Mounted on the rock shaft are double clevises 48 having hubs embracingthe shaft and secured thereto by set screws 49. These clevises aresuitably pivoted to the ends of bars 50 and 51 extending to the rightand left hand sides of the door, respectively, through guiding straps 52and 53. In the inner flanges of the channels 5 and 6 are made openingsadapted to receive the tapered ends of the bars 50 and 51. Theintermediate portion of the shaft is embraced by outwardly extendingears of brackets 54 between which is mounted the hub of a hand lever 56rigid on the shaft and having a suitable handle 57. It will be seen thatswinging the handle from the position shown in Figs. 1 and 2 to aposition substantially at right angles to the door will withdraw theends of the bars 50 and 51 from the openings in the channel flangesthereby releasing the door, whereupon it may be opened. It will be notedparticularly from Fig. 5, that the ends of these bars are formed with ashoulder at 57 pressing firmly against the plate 12 of the door andacting in a wedgelike manner to insure tight contact of the plate withthe wall 31.

From the foregoing description it will be seen that I have provided adoor hanging and latching mechanism accomplishing the results set outand one not liable to get out of order and very durable in service whilebeing capable of construction of standard beams, shafts and bars.

It will also be seen that the latching mechanism provides for holdingthe door in its closed position by engaging it substantially at the fourcorners.

Having thus described my invention what I claim is 1. The combinationwith a door and a doorway, of a rectangular frame pivotally carried bythe doorway adjacent to one edge of the door, said frame having its longdimension vertical, means for pivoting the central portion of the doorto the frame adj acent to the upper and lower corners of the frame, andmeans on the frame for supporting the door.

2. The combination of a door having transverse brace bars secured to itnear its top and bottom respectively, a frame pivoted adjacent to theedge of the bar, and means for pivotally connecting the other edge ofthe frame to said brace bars adjacent to the upper and lower corners ofthe frame.

3. The combination, with a door having transverse brace bars withprojecting flanges, of a rectangular frame pivoted to the doorway, saidframe having top and bottom bars underhanging the brace bars of thedoor, and a vertical shaft extending through the flanges on the frameand door.

4. The combination with a door, of a 105 transverse bracing flangeprojecting outwardly from the door adjacent the top and bottom thereof,a shaft projecting through said flanges, an open frame having inwardlyturned flanges embracing the shaft and ex- 110 tending beneath theflanges on the door, a

beam secured to the wall atthe side of the door and carrying rigidoutward projections, a shaft having bearings in said projections andextending through inwardly turned flanges on said frame whereby theframe may swing about the last mentioned shaft and carry the door. 5.The combination with a door, means for swinging the door to open andclose the same, a shaft mounted on the door, means for rocking saidshaft through a partial rotation, laterally projecting members carriedby said shaft, bars pivoted to said laterally projecting members andextending past the edge of the door, and means at the sides of the. doorfor engaging the ends of said bars when the shaft is moved to projectthe same. i

'6. The combination with a door, of means for swinging the same,structural beams at each side of the door, a shaft carried by the door,laterally extending ears carried by the shaft and projecting in oppositedirections therefrom, bars projecting each way from the shaft andpivoted to said ears, means for partially rotating the shaft to move thebars in and out with relation to the door to cause the bars to'engagethe structural beams.

7. The combination with a door, of means for swinging the same,structural beams at each side of the door having outwardly turnedflanges, a vertical shaft pivoted to the door having laterally extendingears projecting in opposite directions therefrom, bars projecting eachway from the shaft and pivoted to said ears, guides adjacent the sidesof the door through which said bars may slide, means for partiallyrotating the shaft to move the bars in and out with relation to thedoor, openings in said flanges adapted to receive the ends of the bars,the

ends of said bars beingarranged to wedge the door to closed positionwhen thrust outwardly.

8. The combination with a door, of a frame carrying the door; pivotallysecured thereto at vertically separated points, a support at the side ofthe door, Vertically separated pivot members securing the frame to thesupport, a latching mechanism comprising an upright shaft, laterallyextending projections extending in opposite directions fromthe shaft,bars pivoted to said projections and extending past the adjacent edge ofthe door, frame members at the side of the door having flanges providedwith openings adapted to receive the ends of said bars, and means forgiving said shaft a partial rotation to thrust the bars outwardly, orwithdraw the same.

In testimony whereof, I hereunto aflix my signature.

FREDERICK A. COLEMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

